Pregnancy Tests, ovulation, period....SO CONFUSED

Hi All,
I am a first time poster in this forum.
I am hoping for some experiences and ideas...if any.
Sorry its a bit of a story however I will try to make it short.

So January 21 whilst on the pill got my period. However, I went away for the long weekend and didn't bring the pill.
So guess I stopped taking the pill on 23 January.
Period didn't stop until 30th January (Yes almost 2 week period) which I have never had!
So I'm guessing my dates etc will be all out.

There has been a couple of BD sessions along the way. So I was assuming I could become pregnant!
However, I have done 3 at home tests and they have come up negative.

I have no period, a few early symptoms so I was assuming....that it would have been positive. Although my dates etc could be wrong or I am just not pregnant, I'm not sure....all this stuff is so confusing. With DS it was so straight forward...
I am seeing my GP next week, but just wondering if anyone had similar experience and ended up pregnant?
Or any ideas what this could be?

Look forward to your response.
Thanks